Free Car & Vehicle Calculators
Free online calculators for car owners, drivers, and enthusiasts. Calculate fuel costs, tyre sizes, MPG, service intervals, and running costs. Fast, accurate, no signup required.
Fuel & Economy
Calculate fuel costs, MPG, journey fuel usage, and compare petrol vs diesel running costs.
13 calculators →
Tyres & Wheels
Calculate tyre sizes, diameters, wheel offsets, speedometer corrections, and tyre pressure.
11 calculators →
Running Costs
Calculate total car running costs, depreciation, cost per mile, and compare lease vs buy options.
13 calculators →
Performance
Convert power units, calculate power-to-weight ratios, quarter mile times, and gear ratios.
10 calculators →
Dimensions & Towing
Calculate towing capacity, trailer weights, nose weights, and vehicle dimensions.
12 calculators →
EV & Hybrid
Calculate EV range, charging times and costs, battery degradation, and compare EV vs petrol costs.
10 calculators →
Insurance & Finance
Calculate insurance groups, no claims discounts, car loans, PCP deals, and mileage allowances.
10 calculators →
Maintenance
Calculate oil change intervals, brake pad life, coolant mixes, and other maintenance schedules.
11 calculators →
Journey & Travel
Calculate journey times, average speeds, rest stops, carbon footprint, and road trip budgets.
11 calculators →
Conversions
Convert between common automotive units: speed, distance, pressure, torque, and temperature.
10 calculators →
Accessories
Calculators for car accessories including dashcams, roof boxes, and aftermarket upgrades.
1 calculators →
Seasonal
Prepare your car for different seasons with winter, summer, and adverse weather calculators.
1 calculators →
Reference
Useful car reference guides, charts and tables for UK motorists.
4 calculators →
CarCalcs — Free Car & Vehicle Calculators
CarCalcs offers 117+ free car and vehicle calculators across 13 categories covering every aspect of motoring in the UK. Whether you need to work out your MPG, compare tyre sizes, estimate EV charging times, or calculate your total running costs, our tools give you fast, accurate results with no signup required.
From fuel economy and tyre dimensions to insurance groups, road tax bands, and towing capacity, every calculator uses UK-specific data including miles, MPG, pounds sterling, and UK vehicle regulations. Perfect for car owners, fleet managers, mechanics, and motoring enthusiasts.
Browse all 117+ car calculators or search above to find exactly what you need. All tools are completely free and work on any device.